Ever since I added the Jetpack Sharing and Subscriptions modules to my lone Stats module I have not been able to detect an occasion of QuickCache caching my home page, i.e., the signature QC text at the bottom, and my page loads have reverted to those before implementing QC. As best I can tell, this has been well after those activities like posting or commenting which would trigger a cache dump and re-cache.
Those modules do place a number of js lines at the bottom of the page, but I can't imagine why that would be a problem.
Is this a cause and effect or, if not, any ideas why QC might intermittently stop caching? It's been over 7 hours since there have been any posts, comments, or internal backend activity which would normally trigger a cache dump and no signature QC text on the front page.